A parabolic microphone used on the sidelines of a professional football game uses a reflective dish 24 inches wide and 6 inches deep. How far from the bottom of the disk should the microphone be placed?
a.) 6 in
b.) 5.8 in
c.) 5.2 in
d.) 4 in

The answer is a.
When you are solving problems like this you would use the equation y^2=4ax. The x and Y would be the coordinates. Based on the equation you have given the coordinates would be (6,12) and (6,-12), (24 is split up evenly between the y-axis).
Then we go on to solve the equation by plugging in the numbers 12^2=4a(6)
144=24a
144/24=24a/24
6=a

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A parabolic microphone used on the sidelines of a professional football game uses a reflective dish 24 inches wide and 6 inches deep. How far from the bottom of the disk should the microphone be placed? a.) 6 in b.) 5.8 in c.) 5.2 in d.) 4 in

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A parabolic microphone used on the sidelines of a professional football game uses a reflective dish 24 inches wide and 6 inches deep. How far from the bottom of the disk should the microphone be placed?
a.) 6 in
b.) 5.8 in
c.) 5.2 in
d.) 4 in